A 2D / 3D compatible multi-viewing zone stereoscopic display device

Abstract

A 2 / 3D compatible multi-viewing zone stereoscopic display device is composed of a 2D display panel, a one-dimensional retroreflective array, a polarizing film array, a polarizing projector array, and a polarizing plate. In polarization direction A, the device is provided with a plurality of polarizing projector arrays, each of which includes a plurality of polarizing projectors. The polarizing projectors are used to project parallax images. The 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with a plurality of polarizing plates, which are placed near the polarizing projector array. The parallax images projected by any polarizing projector on the polarizing projector array can be projected onto a one-dimensional retroreflective film via the polarizing film on the polarizing film array, and after retroreflection via the one-dimensional retroreflective film, they return to the original polarizing projector position in the horizontal direction, thereby providing a stereoscopic image display. In polarization direction B orthogonal to polarization direction A, the 2D display panel provides a 2D image, and the 2D image is displayed through the gaps of the one-dimensional retroreflective array.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly, to stereoscopic display technology. Background Art

[0002] Stereoscopic display technology is a display technology that can achieve true reproduction of stereoscopic scenes. It can provide different parallax images for human eyes, so that people can have stereoscopic vision. The present invention proposes a 2 / 3D compatible multi-viewing zone stereoscopic display device, which can provide multiple viewing zones, in which stereoscopic images can be seen, and 2D images can be seen outside the viewing zones. Summary of the invention

[0003] The present invention provides a 2D / 3D compatible multi-viewing zone stereoscopic display device. Figure 1 The 2 / 3D compatible multi-viewing zone stereoscopic display device is a schematic diagram of the structure, wherein x represents the horizontal direction in space, y represents the vertical direction in space, and z represents the axial direction perpendicular to the xy plane. The 2 / 3D compatible multi-viewing zone stereoscopic display device is composed of a 2D display panel, a one-dimensional retroreflective array, a polarizer array, a polarization projector array, and a polarizing plate.

[0004] Please refer to Figure 1 , the 2D display panel, the one-dimensional retroreflective array, and the polarizer array are placed in sequence. The 2D display panel is placed at the end, the one-dimensional retroreflective array is placed in the middle, and the polarizer array is placed in the front. The one-dimensional retroreflective array is composed of a number of one-dimensional retroreflective sheets, which can reflect light in the horizontal direction according to the original incident direction and scatter light in the vertical direction. The polarizer array is composed of a number of polarizers in polarization direction A and polarization direction B, respectively, and polarization direction A is orthogonal to polarization direction B. Among them, the polarizer in polarization direction A covers the one-dimensional retroreflective sheet of the one-dimensional retroreflective array, and the polarizer in polarization direction B covers the gap position of the one-dimensional retroreflective array.

[0005] Please refer to Figure 1 The 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with a plurality of polarization projector arrays, each of which includes a plurality of polarization projectors. The polarization projector is used to project a parallax image, and the polarization direction of the light of the projected image is consistent with the polarization direction A.

[0006] Please refer to Figure 1 The 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with a plurality of polarizing plates, which are placed near the polarization projector array. The polarizing plates allow light of polarization direction A to pass through, but do not allow light of polarization direction B to pass through.

[0007] Furthermore, the parallax image projected by any polarized projector on the polarized projector array can be projected onto the one-dimensional retroreflective sheet through the polarized sheet in polarization direction A on the polarized sheet array, and after retroreflection through the one-dimensional retroreflective sheet, it returns to the original polarized projector position in the horizontal direction. When the human eye is near the vertical projection area of ​​the polarized projector behind the polarizing plate, the corresponding parallax image can be seen, thereby generating stereoscopic vision.

[0008] Furthermore, the 2D display panel provides a 2D image, and its light sequentially passes through the gap positions of the one-dimensional retroreflective array and the polarizer covering it in polarization direction B. When the human eye is not behind the polarizer, the 2D image provided by the 2D display panel and part of the light of the parallax image in polarization direction A can be seen. However, due to the retroreflective effect, the light of the parallax image finally converges at the position of the polarization projector, and the light at other positions is weak, so it does not affect the expression of the 2D image provided by the 2D display panel.

[0009] Optionally, an additional polarizing plate may be provided, which allows light in polarization direction B to pass through but does not allow light in polarization direction A to pass through. When the human eye is behind the additional polarizing plate, it can only see the 2D image in polarization direction B, thereby reducing the impact of parallax image light on the 2D image.

[0010] In summary, the present invention can form a viewing zone at the location of the polarization projector array, in which a stereoscopic image in polarization direction A can be seen, while a 2D image in polarization direction B can be seen at other locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 Schematic diagram of a one-dimensional retroreflective sheeting.

[0014] Figure 3 Schematic diagram of a retroreflective film on a one-dimensional retroreflective sheeting.

[0015] Icons: 100-2D display panel; 200-one-dimensional retroreflective array; 210-one-dimensional retroreflective sheet; 300-polarizer array; 301-polarizer of polarization direction A; 302-polarizer of polarization direction B; 410-first polarization projector array; 420-second polarization projector array; 430-third polarization projector array; 401-polarization projector; 500-polarization plate; 201-retroreflective film; 202-cylindrical lens grating A; 203-cylindrical lens grating B; 610-incident light; 620-reflected light; 700-additional polarizer. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the embodiments of the present invention, it should be noted that the terms “first”, “second”, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Example

[0020] Figure 1 The schematic diagram of the structure of a 2 / 3D compatible multi-viewing zone stereoscopic display device provided in this embodiment, wherein x represents the horizontal direction in space, y represents the vertical direction in space, and z represents the axial direction perpendicular to the xy plane. The 2 / 3D compatible multi-viewing zone stereoscopic display device is composed of a 2D display panel 100, a one-dimensional retroreflective array 200, a polarizer array 300, three polarization projector arrays 410-430, and a polarizer 500.

[0021] Please refer to Figure 1, the 2D display panel 100, the one-dimensional retroreflective array 200, and the polarizing array 300 are placed in sequence. The 2D display panel 100 is placed at the end, the one-dimensional retroreflective array 200 is placed in the middle, and the polarizing array 300 is placed at the front. The one-dimensional retroreflective array 200 is composed of a plurality of one-dimensional retroreflective sheets 210, which can reflect light in the horizontal direction according to the original incident direction and scatter light in the vertical direction.

[0022] Please refer to Figure 2 This embodiment uses a one-dimensional retroreflective sheet 210 of existing structure. The one-dimensional retroreflective sheet 210 is composed of a retroreflective film 201, a cylindrical lens grating A 202 and a cylindrical lens grating B 203. Please refer to Figure 3 The retroreflective film 201 is composed of a cubic crystal structure. After three reflections, the incident light 610 can be reflected in the original incident direction to form a reflected light 620. There is a certain displacement between the reflected light 620 and the incident light 610. The cylindrical lenses of the cylindrical lens grating A 202 are arranged vertically, and their pitch is at the same order of magnitude as the side length of a single cubic crystal structure on the retroreflective film 201. It can scatter the light in the vertical direction through the displacement between the incident light 610 and the reflected light 620. The cylindrical lenses of the cylindrical lens grating B 203 are arranged vertically, and their pitch is much larger than the side length of a single cubic crystal structure on the retroreflective film 201, so that the incident light 610 and the reflected light 620 remain almost consistent in the horizontal direction.

[0023] Please refer to Figure 1 The one-dimensional polarizer array 200 is composed of a plurality of polarizers 301 and 302 in polarization direction A and polarization direction B, respectively, and polarization direction A is orthogonal to polarization direction B. The polarizer 301 in polarization direction A covers the one-dimensional retroreflective sheet 210 of the one-dimensional retroreflective array 200, and the polarizer 302 in polarization direction B covers the gap position of the one-dimensional retroreflective array 200.

[0024] Please refer to Figure 1 The 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with three polarization projector arrays 410-430, each of which includes four polarization projectors 401. The polarization projector 401 is used to project a parallax image, and the polarization direction of the light of the projected image is consistent with the polarization direction A.

[0025] Please refer to Figure 1 The 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with a plurality of polarizing plates 500, and the polarizing plates 500 are placed near the polarization projector arrays 410 to 430. The polarizing plates 500 allow light of polarization direction A to pass through, and do not allow light of polarization direction B to pass through.

[0026] Furthermore, the parallax image projected by any polarized projector 401 on the polarized projector array 410~430 can be projected onto the one-dimensional retroreflective sheet 210 through the polarized plate 301 in polarization direction A on the polarized plate array, and after retroreflection through the one-dimensional retroreflective sheet 210, it returns to the original position of the polarized projector 401 in the horizontal direction. Since the projector array 410~430 is composed of 4 polarized projectors 401, 4 viewpoints can be formed in space. When the human eye is near the viewpoint position behind the polarized plate 500, the corresponding parallax image can be seen, thereby generating stereoscopic vision. At the same time, since the polarized plate 500 can filter out the light in polarization direction B, the parallax image viewed is not interfered by the 2D image in polarization direction B.

[0027] Furthermore, the 2D display panel 100 provides a 2D image, and its light sequentially passes through the gaps of the one-dimensional retroreflective array 200 and the polarizer 302 covering it in polarization direction B. When the human eye is not behind the polarizer 500, the 2D image provided by the 2D display panel 100 can be seen.

[0028] At the same time, this embodiment sets an additional polarizing plate 700, which allows light in polarization direction B to pass through, but does not allow light in polarization direction A to pass through. When the human eye is behind the additional polarizing plate 700, it can only see the 2D image in polarization direction B.

[0029] In summary, the present invention can form a viewing zone at the location of the polarization projector arrays 410-430, in which a 3D image in polarization direction A can be seen, while a 2D image in polarization direction B can be seen at other locations.

Claims

1. A 2D / 3D compatible multi-viewing zone stereoscopic display device, characterized in that: The 2 / 3D compatible multi-viewing zone stereoscopic display device is composed of a 2D display panel, a one-dimensional retroreflective array, a polarizing film array, a polarizing projector array, and a polarizing plate; the 2D display panel, the one-dimensional retroreflective array, and the polarizing film array are placed in sequence; the 2D display panel is placed at the end, the one-dimensional retroreflective array is placed in the middle, and the polarizing array is placed in the front; the one-dimensional retroreflective array is composed of a plurality of one-dimensional retroreflective films, which can reflect light in the horizontal direction according to the original incident direction and scatter light in the vertical direction; the polarizing film array is composed of a plurality of polarizing films respectively in polarization direction A and polarization direction B, and polarization direction A is orthogonal to polarization direction B; wherein the polarizing film in polarization direction A covers the one-dimensional retroreflective film in the one-dimensional retroreflective array, and the polarizing film in polarization direction B covers the gap position of the one-dimensional retroreflective array; the 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with a plurality of polarizing projector arrays, each polarizing projector array includes a plurality of polarizing projectors; The projector is used to project a parallax image, and the polarization direction of the light of the projected image is consistent with polarization direction A; the 2 / 3D compatible multi-viewing zone stereoscopic display device is provided with multiple polarization plates, and the polarization plates are placed near the polarization projector array; the polarization plates allow light in polarization direction A to pass through, and do not allow light in polarization direction B to pass through; the parallax image projected by any polarization projector on the polarization projector array can be projected onto a one-dimensional retroreflective sheet through a polarizer in polarization direction A on the polarizer array, and after retroreflection through the one-dimensional retroreflective sheet, it returns to the original polarization projector position in the horizontal direction; when the human eye is near the vertical projection area of ​​the polarization projector behind the polarization plate, the corresponding parallax image can be seen, thereby generating stereoscopic vision; the 2D display panel provides a 2D image, and its light passes through the gap position of the one-dimensional retroreflective array and the polarizer in polarization direction B covering it in sequence; when the human eye is not behind the polarization plate, the 2D image provided by the 2D display panel can be seen.

2. A 2D / 3D compatible multi-viewing zone stereoscopic display device as claimed in claim 1, characterized in that: An additional polarizing plate is provided, which allows light in polarization direction B to pass through, but does not allow light in polarization direction A to pass through; when the human eye is behind the additional polarizing plate, only the 2D image in polarization direction B can be seen, thereby reducing the influence of the parallax image light on the 2D image.

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